Reservoir physical property detection method and device
By using rock cuttings as samples and combining them with a target body formed by epoxy resin and solid glue for nuclear magnetic resonance detection, the high cost and low yield problems of reservoir property assessment in unconventional oil and gas fields have been solved, achieving low-cost and high-efficiency reservoir property detection.
Patent Information
- Application Number
- CN202511077839.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-01
- Publication Date
- 2025-11-07
AI Technical Summary
In the development of unconventional oil and gas fields, existing technologies have low yields and high costs for obtaining complete columnar cores, and the construction costs of using large nuclear magnetic resonance equipment are high, making it difficult to effectively assess reservoir properties.
By obtaining saturated liquid rock fragments encased in the target body as samples, forming rock fragment colloids using epoxy resin and solid glue, and performing nuclear magnetic resonance (NMR) detection, the echo train of the rock fragments and the NMR signal of the pore fluid are determined, and then the porosity and permeability are calculated.
It reduces reliance on complete columnar cores, lowers testing costs, improves the accuracy and efficiency of test results, and simplifies the size of nuclear magnetic resonance equipment.
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Figure CN120908061A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of oil and gas development, and particularly relates to a reservoir property detection method, a reservoir property detection device, a computer device, a computer readable storage medium, and a computer program product. BACKGROUND
[0002] Reservoir property is a key factor for evaluating reservoir quality and affecting safe and efficient drilling.
[0003] In related technologies, in a first mode, a complete columnar core is drilled and then placed in a nuclear magnetic resonance device for nuclear magnetic resonance to study the property of the reservoir corresponding to the core; in a second mode, the nuclear magnetic resonance device is lowered into the well, and then nuclear magnetic resonance is performed on the well to study the property of the reservoir.
[0004] However, in the development of unconventional oil and gas fields, the internal structure of the oil and gas field is complex and irregular, which leads to low harvesting rate and high cost of the complete core in the first mode, and the second mode needs to rely on a large nuclear magnetic resonance device to provide a high magnetic field strength, resulting in high construction cost. SUMMARY
[0005] The present disclosure provides a reservoir property detection method, a reservoir property detection device, a computer device, a computer readable storage medium, and a computer program product to determine the reservoir property in a simple, efficient, and low-cost manner.
[0006] To solve the above technical problems, the embodiments of the present disclosure provide the following technical solutions:
[0007] The first aspect of the present disclosure provides a reservoir property detection method, which can include: obtaining a first sample, the first sample being a cutting wrapped by a target body and having saturated liquid; obtaining a second sample, the second sample being made of the target body; determining an echo train of the cutting according to an echo train of the first sample and the second sample; determining a pore fluid nuclear magnetic signal of the cutting according to the echo train of the cutting; determining a pore volume of the cutting according to the pore fluid nuclear magnetic signal of the cutting; and determining a porosity of the cutting according to the pore volume of the cutting and a volume of the cutting.
[0008] Compared with the prior art, the reservoir property detection method provided by the first aspect of the present disclosure can reduce the dependence on complete columnar cores and reduce the volume of the nuclear magnetic resonance device, and the cutting is easy to obtain, efficient to obtain, and low in cost. In addition, the cutting containing saturated liquid is encapsulated by the target body, which can reduce the volatilization or loss of the saturated liquid during the detection process, so as to improve the accuracy of the detection result.
[0009] In other embodiments of the present disclosure, the obtaining the first sample, the first sample being a cuttings wrapped by the target body and having a saturated liquid, comprises: cleaning and drying the cuttings; saturating the cuttings with a liquid to obtain a saturated sample; wrapping the saturated sample with the target body formed by mixing the target proportion of epoxy resin and solid glue to obtain a cuttings glue; and polishing the wrapping layer of the cuttings glue to obtain the first sample with a first regular shape.
[0010] In other embodiments of the present disclosure, the obtaining the second sample, the second sample being made of the target body, comprises: preparing a glue sample with the target body formed by mixing the target proportion of epoxy resin and solid glue; and polishing the glue sample to obtain the second sample with a second regular shape, the second regular shape being consistent with the first regular shape.
[0011] In other embodiments of the present disclosure, the determining the echo train of the cuttings according to the echo trains of the first sample and the second sample comprises: obtaining a first echo train of the first sample; obtaining a second echo train of the target body in the first sample, comprising: obtaining a third echo train of the second sample; determining a unit mass echo train of the second sample according to the third echo train; determining the second echo train according to the unit mass echo train and the mass of the target body in the first sample; and determining the echo train of the cuttings according to the first echo train and the second echo train.
[0012] In other embodiments of the present disclosure, the determining the pore volume of the cuttings according to the pore fluid nuclear magnetic signal of the cuttings comprises: obtaining a nuclear magnetic signal of the saturated liquid; and determining the pore volume of the cuttings according to the pore fluid nuclear magnetic signal of the cuttings and the nuclear magnetic signal of the saturated liquid.
[0013] In other embodiments of the present disclosure, after the determining the porosity of the cuttings according to the pore volume of the cuttings and the volume of the cuttings, the method further comprises: determining the permeability of the cuttings according to the porosity of the cuttings and an empirical model.
[0014] In other embodiments of the present disclosure, the saturating the cuttings with a liquid to obtain a saturated sample comprises: saturating the cuttings with a liquid to obtain a saturated body; and performing a centrifugal operation on the saturated body to obtain a saturated sample maintained at a target mass; and the reservoir property detection method further comprises: determining the irreducible saturation of the cuttings according to the pore volume of the cuttings and the volume of the cuttings.
[0015] A second aspect of this disclosure provides a reservoir property testing device, which may include: a first acquisition module, a second acquisition module, a first determination module, a second determination module, a third determination module, and a fourth determination module. The first acquisition module is used to acquire a first sample, which is rock cuttings encapsulated by a target body and containing saturated liquid. The second acquisition module is used to acquire a second sample, which is made from the target body. The first determination module is used to determine the echo train of the rock cuttings based on the echo trains of the first sample and the second sample. The second determination module is used to determine the pore fluid NMR signal of the rock cuttings based on the echo train of the rock cuttings. The third determination module is used to determine the pore volume of the rock cuttings based on the pore fluid NMR signal of the rock cuttings. The fourth determination module determines the porosity of the rock cuttings based on the pore volume and the volume of the rock cuttings.
[0016] A third aspect of this disclosure provides a computer device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method in the first aspect.
[0017] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method in the first aspect.
[0018] The fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method in the first aspect.
[0019] The reservoir property testing device provided in the second aspect of this application, the computer equipment provided in the third aspect, the computer-readable storage medium provided in the fourth aspect, and the computer program product provided in the fifth aspect have the same or similar beneficial effects as the reservoir property testing method provided in the first aspect.
[0020] The above description is only an overview of the technical solution of this disclosure. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, the preferred embodiments of this disclosure are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0021] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:
[0022] Figure 1 Flowchart of the reservoir property testing method provided in this disclosure Figure 1 ;
[0023] Figure 2 Flowchart of the reservoir property detection method provided by the present disclosure Figure 2 ;
[0024] Figure 3 Flowchart of the reservoir property detection method provided by the present disclosure Figure 3 ;
[0025] Figure 4 Flowchart of the reservoir property detection method provided by the present disclosure Figure 4 ;
[0026] Figure 5 Structure diagram of the reservoir property detection device provided by the present disclosure. DETAILED DESCRIPTION
[0027] Exemplary embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thoroughly and completely understood, and will fully convey the scope of the application to those skilled in the art.
[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs.
[0029] First aspect
[0030] The present disclosure provides a reservoir property detection method, as shown in Figure 1 The method can include:
[0031] S101 obtaining a first sample, the first sample being a rock fragment wrapped by a target body and having a saturated liquid;
[0032] The target body can be a colloid, which can be a liquid when wrapping the rock fragment containing the saturated liquid, and can form a solid after a period of time after wrapping is completed; the saturated liquid can be saturated water, saturated oil, etc. Here, the rock fragment can be a rock fragment block of more than 3 millimeters, and multiple rock fragments can be selected for synchronous detection, and the final multiple detection values can be calculated by mean value or the like to obtain a more accurate detection result.
[0033] S102 obtaining a second sample, the second sample being made of a target body;
[0034] The material for making the second sample is consistent with the material for wrapping the first sample, for example, the second sample is also made of a colloid; the shape of the second sample can be consistent or inconsistent with the shape of the first sample.
[0035] S103 determining the echo train of the rock debris according to the echo trains of the first sample and the second sample;
[0036] The echo train of the first sample can be obtained by placing the first sample in the nuclear magnetic resonance device for detection, and the echo train of the second sample can be obtained by placing the second sample in the nuclear magnetic resonance device for detection. The echo train of the rock debris can be determined by the difference between the echo train of the first sample and the echo train of the target body in the first sample, and the material of the target body in the first sample is the same as that of the second sample. Therefore, the echo train of the target body in the first sample can be determined by the echo train of the second sample.
[0037] S104 determining the pore fluid nuclear magnetic signal (S 岩屑 ) of the rock debris according to the echo train of the rock debris;
[0038] The pore fluid nuclear magnetic signal (S 岩屑 ) of the rock debris can be obtained by inverting the echo train of the rock debris determined in step S103.
[0039] S105 determining the pore volume (V 岩屑孔隙 ) of the rock debris according to the pore fluid nuclear magnetic signal (S 岩屑 ) of the rock debris;
[0040] V 岩屑孔隙 =S 岩屑 / K 饱和液体
[0041] Here, K 饱和液体 is the unit volume nuclear magnetic signal of the saturated liquid.
[0042] S106 determining the porosity (φ) of the rock debris according to the pore volume (V 岩屑孔隙 ) of the rock debris and the volume (V 岩屑 ) of the rock debris.
[0043] V 岩屑 =V 第一样品 -V 目标体
[0044] φ 岩屑 =V 岩屑孔隙 / V 岩屑
[0045] Here, V 第一样品 is the volume of the first sample, which can be obtained by measuring the size and the volume calculation formula corresponding to the shape in the case of regular shape, or by immersing the first sample in the liquid before and after the liquid level volume difference in the case of irregular shape, or by other ways; V 目标体The volume of the target body wrapped by the outer layer of the debris can be determined by the volume of the target body material consumed in the process of preparing the first sample.
[0046] In this embodiment, the reservoir physical property research is carried out through the debris, which can reduce the dependence on the intact columnar core, and can reduce the volume of the nuclear magnetic resonance equipment, and the debris is easy to obtain, efficient to obtain and low in cost. In addition, the target body encapsulates the debris containing saturated liquid, which can reduce the volatilization or loss of the saturated liquid in the detection process, so as to improve the accuracy of the detection result.
[0047] Further, referring to Figure 2 As shown in the figure, S101 obtains a first sample, the first sample is a debris wrapped by a target body and having saturated liquid, which can include:
[0048] S201 washes and dries the debris;
[0049] The mud and oil-containing substances on the surface of the debris are washed to reduce the influence of the mud and oil-containing substances on the detection result. The washed debris can be placed in a constant temperature drying box for drying to reduce the influence of the residual unsaturated liquid on the detection result.
[0050] S202 saturates the debris with liquid to obtain a saturated sample;
[0051] S203 wraps the saturated sample with a target body formed by mixing the target proportion of epoxy resin and solid glue to obtain a debris colloid;
[0052] The target proportion can be the first proportion or the second proportion.
[0053] S204 grinds the wrapping layer of the debris colloid to obtain a first sample with a first regular shape.
[0054] Here, the grinding operation is to make the shape of the first sample form a regular first regular shape, so that when the volume of the first sample is obtained, it can be obtained conveniently and quickly by measuring the size and substituting it into the corresponding calculation formula, for example: if the first regular shape is a circular cake, the volume of the first sample can be determined by obtaining the radius r of the bottom surface and the thickness h of the first sample, and by the formula Vfirst sample=πr 2 h.
[0055] Further, referring to Figure 2 As shown in the figure, S102 obtains a second sample, the second sample is made of a target body, which can include:
[0056] S205 prepares a colloid sample by mixing the target proportion of epoxy resin and solid glue to form a target body;
[0057] If the target ratio in step S203 is the first ratio, the target ratio in S301 is also the first ratio; if the target ratio in step S203 is the second ratio, the target ratio in S301 is also the second ratio, so as to reduce the impact of inconsistent ratios on the detection results.
[0058] S206 polishes the colloidal sample to obtain a second sample with a second regular shape, which is consistent with the first regular shape.
[0059] Here, to maximize the accuracy of the detection results, the number of air bubbles in the second sample is minimized during preparation. The shape of the second sample is identical to that of the first sample. This not only allows for NMR testing of both samples using the same equipment, but also ensures that the magnetic field distribution and signal attenuation characteristics of the two samples are solely due to differences in rock fragments, thereby improving the detection results.
[0060] Further, see Figure 2 As shown, S103 determines the echo train of rock cuttings based on the echo trains of the first and second samples, which may include:
[0061] S207 acquires the first echo train (B) of the first sample. 第一样品 );
[0062] The echo train of the first sample can be obtained by placing the first sample in an NMR device for detection.
[0063] Obtain the second echo train (B) of the target body in the first sample. 目标体 ),include:
[0064] S208 acquires the third echo train (B) of the second sample. 第二样品 );
[0065] The echo train of the second sample can be obtained by placing the second sample in an NMR device for detection.
[0066] S209 based on the third echo train (B) 第二样品 Determine the unit mass echo train (B) of the second sample;
[0067] B = B 第二样品 / M 第二样品
[0068] M 第二样品 The mass of the second sample can be obtained by weighing the second sample.
[0069] S210 is based on the unit mass echo train (B) and the target mass (M) in the first sample. 目标(B target body), determine the second echo train (B target body);
[0070] B 目标体 =B*M 目标体
[0071] M 目标体 The mass difference between the mass of the first sample and the mass of the rock fragments containing saturated liquid can be obtained by weighing the first sample and the rock fragments containing saturated liquid separately.
[0072] S211 based on the first echo train (B) 第一样品 ) and second echo train (B 目标体 ), to determine the echo train of rock cuttings (B 岩屑 ).
[0073] B 岩屑 =B 第一样品 -B 目标体
[0074] Here, by combining nuclear magnetic resonance (NMR) equipment and weighing equipment, echo trains of rock cuttings can be obtained. The methods of using NMR equipment and weighing equipment are already well-established, which can simplify operation and improve detection efficiency.
[0075] Further, see Figure 2 As shown, S106, which determines the pore volume of rock cuttings based on the pore fluid NMR signal of the rock cuttings, may include:
[0076] S213 acquires the NMR signal (kΩ) of the saturated liquid. 饱和液体 );
[0077] k 饱和液体 By using a known volume (V) 饱和液体 A saturated liquid was placed into a nuclear magnetic resonance (NMR) device to obtain its NMR signal (SN). 饱和液体 ), and then through k 饱和液体 =S 饱和液体 / V 饱 The formula for liquids can be used to obtain k saturated liquids.
[0078] S214 is based on the pore fluid NMR signal of rock cuttings (S 岩屑 ) and the nuclear magnetic resonance signal (k) of saturated liquid. 饱和液体 Determine the pore volume (V) of the rock cuttings. 岩屑孔隙 ).
[0079] V 岩屑孔隙 =S 岩屑 / k 饱和液体
[0080] V 岩屑 =V 第一样品 -V 目标体
[0081] φ 岩屑 =V 岩屑孔隙 / V 岩屑
[0082] Here, the pore volume (V) of the rock cuttings is obtained. 岩屑孔隙 In the case of ), the volume (V) of the rock cuttings can be further obtained. 岩屑 ), and then based on the pore volume of the rock fragments (V 岩屑孔隙 ) and the volume of rock fragments (V 岩屑 ), determine the porosity (φ) of the rock cuttings. 岩屑 ).
[0083] See one example. Figure 2 As shown, a reservoir property testing method may include:
[0084] S101: Obtain a first sample, which is rock fragments encased in a target body and saturated with liquid; this may include: S201 cleaning and drying the rock fragments; S202 saturating the rock fragments with liquid to obtain a saturated sample; S203 encasing the saturated sample in a target body formed by mixing epoxy resin and solid glue in a target ratio to obtain a rock fragment colloid; S204 polishing the encasing layer of the rock fragment colloid to obtain a disc-shaped first sample.
[0085] S102: Obtain a second sample, which is made from the target body; it may include: S205 preparing a colloidal sample by mixing the target body with epoxy resin and solid glue in a target ratio; S206 polishing the colloidal sample to obtain a second sample with a second regular shape, the second regular shape being consistent with the first regular shape.
[0086] S103: Determine the echo train of the rock cuttings based on the echo trains of the first and second samples; S207 Obtain the first echo train (B) of the first sample. 第一样品 ); Obtain the second echo train (B) of the target body in the first sample. 目标体 The process includes: S208 acquiring the third echo train (B second sample) of the second sample; S209 determining the unit mass echo train (B) of the second sample based on the third echo train (B second sample); S210 determining the unit mass echo train (B) and the target mass (M) in the first sample based on the unit mass echo train (B) and the target mass (M). 目标体 ), determine the second echo train (B) 目标体 S211 based on the first echo train (B) 第 The first sample) and the second echo train (B target body) are used to determine the echo train of the rock cuttings (B rock cuttings).
[0087] B = B 第二样品 / M 第二样品
[0088] B 目标体 =B*M 目标体
[0089] B 岩屑 =B 第一样品 -B 目标体
[0090] S104: Through the echo train of rock cuttings (B 岩屑 Inversion was performed to determine the pore fluid nuclear magnetic resonance signal (SMR) of the rock cuttings. 岩屑 );
[0091] S105: Based on the pore fluid NMR signal of rock cuttings (S 岩屑 Determine the pore volume (V) of rock cuttings. 岩屑孔隙 );
[0092] V 岩屑孔隙 =S 岩屑 / k 饱和液体
[0093] S106: Based on the pore volume of rock cuttings (V 岩屑孔隙 ) and the volume of rock fragments (V 岩屑 The porosity (φ) of rock cuttings can be determined, which may include: S213 acquiring the nuclear magnetic resonance signal (kNMR) of the saturated liquid. 饱和液体 S214 is based on the pore fluid nuclear magnetic resonance signal of rock cuttings (S... 岩屑 ) and the nuclear magnetic resonance signal (k) of saturated liquid. 饱和液体 Determine the pore volume (V) of the rock cuttings. 岩屑孔隙 S215 is based on the pore volume (V) of rock cuttings. 岩屑孔隙 ) and the volume of rock fragments (V 岩屑 To determine the porosity (φ) of the rock cuttings.
[0094] V 岩屑 =V 第一样品 -V 目标体
[0095] φ 岩屑 =V 岩屑孔隙 / V 岩屑
[0096] In some embodiments, see Figure 3 As shown, after determining the porosity of rock cuttings based on the pore volume and volume of the rock cuttings in S106, it may further include: S316 determining the permeability of rock cuttings based on the porosity of the rock cuttings and an empirical model.
[0097] Empirical models can be free fluid models (also known as Timur-Coates models), SDR models, etc. Timur-Coates models and SDR models are well-known and will not be elaborated on here.
[0098] In some embodiments, referring to Figure 4 S202, the liquid saturation of the cuttings is performed to obtain a saturated sample, which can include:
[0099] S402, the liquid saturation of the cuttings is performed to obtain a saturated sample;
[0100] S403, the centrifugal operation is performed on the saturated sample to obtain a saturated sample maintained at a target mass;
[0101] The reservoir property detection method can further include:
[0102] S109, the bound saturation of the cuttings is determined according to the pore volume of the cuttings and the volume of the cuttings.
[0103] That is, unlike the porosity detection method, after the cuttings are saturated, a centrifugal operation needs to be performed, and during the centrifugal process, the saturated sample is formed under the condition that the mass is unchanged, and the other steps are consistent with the porosity. Finally, the bound saturation can be obtained through V 岩屑孔隙 / Vcuttings formula. When the saturated liquid is water, the bound water saturation is obtained.
[0104] So far, the reservoir property detection method provided by the embodiments of the present application has been fully described.
[0105] The second aspect
[0106] Based on the same inventive concept, the present disclosure provides a reservoir property detection device, referring to Figure 5 The device can include:
[0107] The first acquisition module 11 is configured to acquire a first sample, and the first sample is cuttings wrapped by a target body and having a saturated liquid;
[0108] The second acquisition module 12 is configured to acquire a second sample, and the second sample is made of the target body;
[0109] The first determination module 13 is configured to determine the echo train of the cuttings according to the echo trains of the first sample and the second sample;
[0110] The second determination module 14 is configured to determine the pore fluid NMR signal of the cuttings according to the echo train of the cuttings;
[0111] The third determination module 15 is configured to determine the pore volume of the cuttings according to the pore fluid NMR signal of the cuttings;
[0112] The fourth determination module 16 is configured to determine the porosity of the cuttings according to the pore volume of the cuttings and the volume of the cuttings.
[0113] The shapes of the first sample and the second sample can be consistent, that is, the volumes of the two can be consistent, so as to reduce the influence on the detection result.
[0114] It should be noted that the reservoir property detection method in the reservoir property detection device provided by the present disclosure is similar to the description of the reservoir property detection method embodiments described above, and has similar beneficial effects as the reservoir property detection method embodiments described above. For technical details not disclosed in the reservoir property detection device embodiments of the present disclosure, please refer to the description of the reservoir property detection method embodiments in the present disclosure for understanding, which will not be repeated here.
[0115] Third aspect
[0116] The present disclosure provides a computer device, comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to realize the steps of the method in the first aspect.
[0117] It should be noted that the description of the above computer device embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the computer device embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.
[0118] Fourth aspect
[0119] The present disclosure provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of any one of the methods in the first aspect.
[0120] It should be noted that the description of the above computer readable storage medium embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the computer readable storage medium embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.
[0121] Fifth aspect
[0122] The present disclosure provides a computer program product, comprising a computer program, and the computer program is executed by a processor to realize the steps of any one of the methods in the first aspect.
[0123] It should be noted that the description of the above computer program product embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the computer program product embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.
[0124] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A method of reservoir property detection, characterized by, The method comprises: obtaining a first sample, the first sample being a rock fragment wrapped by a target body and having saturated liquid; obtaining a second sample, the second sample being made of the target body; determining an echo train of the rock fragment according to echo trains of the first sample and the second sample; determining a pore fluid NMR signal of the rock fragment according to the echo train of the rock fragment; determining a pore volume of the rock fragment according to the pore fluid NMR signal of the rock fragment; determining a porosity of the rock fragment according to the pore volume of the rock fragment and a volume of the rock fragment.
2. The reservoir property detection method of claim 1, wherein, The method for obtaining the first sample, the first sample being a rock fragment wrapped by a target body and having saturated liquid, comprises: cleaning and drying the rock fragment; saturating the rock fragment with liquid to obtain a saturated sample; wrapping the saturated sample with a target body formed by mixing epoxy resin and solid glue in a target proportion to obtain a rock fragment colloid; polishing a wrapping layer of the rock fragment colloid to obtain a first sample of a first regular shape.
3. The reservoir property detection method of claim 2, wherein, The method for obtaining the second sample, the second sample being made of the target body, comprises: preparing a colloid sample by using the target body formed by mixing epoxy resin and solid glue in the target proportion; polishing the colloid sample to obtain a second sample of a second regular shape, the second regular shape being consistent with the first regular shape.
4. The reservoir property detection method of claim 3, wherein, The method for determining the echo train of the rock fragment according to the echo trains of the first sample and the second sample comprises: obtaining a first echo train of the first sample; obtaining a second echo train of the target body in the first sample, comprising: obtaining a third echo train of the second sample; determining a unit mass echo train of the second sample according to the third echo train; determining the second echo train according to the unit mass echo train and a mass of the target body in the first sample; determining the echo train of the rock fragment according to the first echo train and the second echo train.
5. The reservoir property detection method of claim 4, wherein, The method for determining the pore volume of the rock fragment according to the pore fluid NMR signal of the rock fragment comprises: obtaining a NMR signal of the saturated liquid; determining the pore volume of the rock fragment according to the pore fluid NMR signal of the rock fragment and the NMR signal of the saturated liquid.
6. The reservoir property detection method of claim 5, wherein, After the method for determining the porosity of the rock fragment according to the pore volume of the rock fragment and the volume of the rock fragment, the method further comprises: determining a permeability of the rock fragment according to the porosity of the rock fragment and an empirical model.
7. The method according to claim 5, wherein the method for saturating the rock fragment with liquid to obtain a saturated sample comprises: saturating the rock fragment with liquid to obtain a saturated body; performing a centrifugal operation on the saturated body to obtain a saturated sample maintained at a target mass; the method further comprises: determining a bound saturation of the rock fragment according to the pore volume of the rock fragment and the volume of the rock fragment.
8. A reservoir property detection apparatus, characterized by, The method comprises: a first obtaining module configured to obtain a first sample, the first sample being a rock fragment wrapped by a target body and having saturated liquid; a second obtaining module configured to obtain a second sample, the second sample being made of the target body; and a determining module configured to determine an echo train of the rock fragment according to echo trains of the first sample and the second sample. a first determining module configured to determine an echo train of the cutting based on the echo trains of the first sample and the second sample; a second determining module configured to determine a pore fluid NMR signal of the cutting based on the echo train of the cutting; a third determining module configured to determine a pore volume of the cutting based on the pore fluid NMR signal of the cutting; a fourth determining module configured to determine a porosity of the cutting based on the pore volume of the cutting and a volume of the cutting.
9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by a processor, implements the steps of the method of any one of claims 1 to 7.
10. A computer program product comprising a computer program, characterized in that, The computer program, when executed by a processor, implements the steps of the method of any one of claims 1 to 7.